The Glass Kingdom
Garasu no Okoku (Sanku Kingudomu)
"While Heero intends to take the Wing Gundam back and leave, Quatre convinces him to stay in the Sanc Kingdom to defend Relena. Later, when OZ attacks a Treize Faction unit stationed in the Sanc Kingdom as an excuse to also invade the pacifist nation, Heero successfully repels the attack with his Gundam and (once again) saves Relena's life in the process. Although she advocates pacifism, Relena allows Heero and Noin to form a small defense force of mobile suits to defend the country. "